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Use std::less instead of < in array_pod_sort's default comparator.

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This makes array_pod_sort portably safe to use with pointers.

llvm-svn: 207043
This commit is contained in:
Jordan Rose 2014-04-23 22:44:11 +00:00
parent e064af9075
commit 1c39b310bb
1 changed files with 6 additions and 5 deletions
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11
include/llvm/ADT/STLExtras.h
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@ -171,13 +171,14 @@ LLVM_CONSTEXPR inline size_t array_lengthof(T (&)[N]) {
return N;
}
/// array_pod_sort_comparator - This is helper function for array_pod_sort,
/// which just uses operator< on T.
/// Adapt std::less<T> for array_pod_sort.
template<typename T>
inline int array_pod_sort_comparator(const void *P1, const void *P2) {
if (*reinterpret_cast<const T*>(P1) < *reinterpret_cast<const T*>(P2))
if (std::less<T>()(*reinterpret_cast<const T*>(P1),
*reinterpret_cast<const T*>(P2)))
return -1;
if (*reinterpret_cast<const T*>(P2) < *reinterpret_cast<const T*>(P1))
if (std::less<T>()(*reinterpret_cast<const T*>(P2),
*reinterpret_cast<const T*>(P1)))
return 1;
return 0;
}
@ -200,7 +201,7 @@ inline int (*get_array_pod_sort_comparator(const T &))
/// possible.
///
/// This function assumes that you have simple POD-like types that can be
/// compared with operator< and can be moved with memcpy. If this isn't true,
/// compared with std::less and can be moved with memcpy. If this isn't true,
/// you should use std::sort.
///
/// NOTE: If qsort_r were portable, we could allow a custom comparator and